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Testing CAN databus > < Activating and deactivating cruise control system (CCS)

Octavia Mk1

Testing cruise control system (CC)
Testing cruise control system (CC)
With the exception of an operating switch the CCS does not have any components of its own. All functions are performed by the engine control unit. The minimum vehicle speed for the CCS function is 30 km/h.
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3, 3A, 3B oder 3C-
t  Handheld multimeter (e.g. -V.A.G 1526 A-)
t  Measuring tool set (e.g. -V.A.G 1594 A-)
t  Test box -V.A.G 1598/22- or -V.A.G 1598/31-
Test conditions
l  Fuses o.k.
Test sequence
–  Connecting up the vehicle system tester and selecting → Chapter the control unit for engine electronics.
–  Read measured value block, display group 006, engine at idling speed → Chapter.
   
Observe display in display field 4.
Specified value:
   0 = CCS disconnected
   1 = CCS connected
   255 = CCS not activated
For models with automatic gearbox
–  Perform a test drive and exceed a speed above 30 km/h. The selector lever must be in the pos. 2, 3 or D.
–  Apply handbrake.
For all vehicles
  
Reading measured value block 6     ->
0 km/h      0 0 0       000000        0
Observe display in display field 3.
  
Reading measured value block 6     ->
0 km/h      0 0 0       000000        0
CCS switch position
  N23-0199
Test conditionsDisplay field 3
Switch -B- to “ON”000011
Switch -B- to “RES”001011
Switch -A- operated000111
Switch -B- to “OFF” before operating point000001
Switch -B- locked to “OFF”000000
Brake pedal actuated010011
Clutch pedal actuated100011

If the specified values are not reached:
–  End output (function 06).
–  Switch off ignition.
   
–  Use the hand multimeter to test the CCS switch resistance in accordance with the following table:
  N23-0199
CCS switch10-pin plug on CCS switch, contactSpecified value
Switch -B- to “ON”4 + 5
6 + 7		max. 1.5 Ω
Switch -B- to “RES”4 + 5
2 + 7
6 + 7		max. 1.5 Ω
Switch -A- operated3 + 7max. 1.5 Ω
Switch -B- operated in “OFF”6 + 7
4 + 5		max. 1.5 Ω
∞ Ω
Switch -B- locked to “OFF”6 + 7
2 + 7
4 + 5		∞ Ω

If the specified values are not reached:
–  Replace CCS switch.
If the specified values are reached:
–  Connect test box -V.A.G 1598/22- or -V.A.G 1598/31- to wiring loom of engine control unit. The control unit is not connected → Chapter.
–  Check el. wiring, if necessary eliminate open circuits or short-circuits according to current flow diagrams (10-pin plug on CCS switch, contacts 2, 3, 4, 5, 6 and 7) → Current flow diagrams and Fitting locations.
If the lines are not found to be faulty:
–  Replacing engine control unit -J248- → Chapter.
   

Testing CAN databus > < Activating and deactivating cruise control system (CCS)